This was the only album produced by Will Malone, who lacked interest in the project and allowed the band to produce most of the album themselves. The band (especially Steve Harris) criticised the quality of the production, but many fans like the raw, almost punk-like sound to the songs. This was also the only studio album for guitarist Dennis Stratton, who left a short time after the album was released. He was replaced by Adrian Smith. "Transylvania" is a well known instrumental piece by the band which was composed by founder and bassist Steve Harris. The song was covered by Iced Earth on the album Horror Show. "Strange World" tells of a dystopian society, where people never grow old. Amongst other things the narrator (singer) laments how "smiling faces [are] ever so rare". Meanwhile, "Charlotte the Harlot" is the first of four Iron Maiden songs which make reference to the fictional prostitute 'Charlotte'. The 7-minute epic "Phantom of the Opera" remains a fan favourite, and is still performed at many Maiden concerts, while live performances of "Iron Maiden" often signal the entrance of band mascot Eddie onto the stage.